Hangeul was created as a phonetic alphabet and is known to have the best 1:1 correspondence between letters and pronunciation among existing alphabets. In this paper, we examine the possibility of modifying the basic form of Hangeul and using it as a kind of phonetic symbol. The core concept of this approach is to preserve the basic form of the alphabet, modifying only the shape of a stroke rather than the letter itself. To the best of our knowledge, no previous attempts in any language have been made to express pronunciations of an alphabet different from the original simply by changing the shape of the alphabet strokes, and this paper is probably the first attempt in this direction.